Totally agree, and since I am the owner I want to see it done correctly the second time for my personal home. It cost quite a bit more, but think it was worth it in the long run. New ac unit, air handler (blower & tin) heat etc..and with a 7 day/ 365 guarentee to do repairs for ten years within 2 hrs.. I will see.
Heat and Air Duct Advise
- Thread starter OKnewguy
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Totally agree, and since I am the owner I want to see it done correctly the second time for my personal home. It cost quite a bit more, but think it was worth it in the long run. New ac unit, air handler (blower & tin) heat etc..and with a 7 day/ 365 guarentee to do repairs for ten years within 2 hrs.. I will see.
AndyMA
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AndyMA
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- Ford 2120 , Kubota MX5200 , Deere X748SE. 1956 Economy Tractor
I agree with that. Just put 4 units in my house. 2 9,000 & 2 12,000 BTU
They can carry all AC load and heating load down to about 10 degree F
Andy
OP
OKnewguy
Platinum Member
Okay gang, I am still gathering information. I have one more quote yet to receive, so that might me interesting. I am reconsidering the ductless mini's too. These were the units that I thought about when we bought this property, but a renter (a referral thru a friend) happened quickly and I popped in a bunch of window units and bought those baseboard heaters to get everything working well. The original setup was a old tired and dangerous wall furnace a a huge window unit in one room.
What brands of mini's have people had good success with? Is the Mr Slims still the way to go? Am I overly worried about the service life of these things?
What are your thoughts.
Thanks so much for the help everyone!
Dave
What brands of mini's have people had good success with? Is the Mr Slims still the way to go? Am I overly worried about the service life of these things?
What are your thoughts.
Thanks so much for the help everyone!
Dave
Ken
Veteran Member
I was thinking of a economy type of installation. the building is not much bigger than a modern R.V. with slide outs. extended.
If your thinking of purchasing the top of the line heat pump with all the bells and whistles. first look at the doors and windows then the insulation in walls and ceiling. insulate the area under the floor. make it like a refrigerator with no air leaks. Then refigure the needs of size. have some wells dug for thermo cooling of the freon. Solor cells for elec.
The cost monthly will be low but the cost of installation will take good 30 years to pay off.
There is so many ways of getting a a/c installed and every one has good ideas. all with increased cost to the buyer.
Proper duct design and return line with this small unit air from under the doors to a over head return to unit my mention of large enough not be able to notice the unit is running. I have been in houses where it is all you hear.
The cool air some times the fan is running so fast like sitting in car with windows is down
all designed by qualified a/c men.
Working under new houses and watching the duct work being installed by employees of large company makes me wonder if they cared about what they were doing. duct pushed and held by one screw and taped to keep in place just a bump and it is all loose and leaking.
Have told more than one owner to crawl under house and watch what is going on .
And again thinking of construction told one laying plywood decking on house roof maybe have his nailer put the nails in the truss. it would hold better.
Back to your problem of installing a/c units small heat pump self contained and your mother probally would be happy to have you around while doing the install.
Take your time were all getting older.
ken
If your thinking of purchasing the top of the line heat pump with all the bells and whistles. first look at the doors and windows then the insulation in walls and ceiling. insulate the area under the floor. make it like a refrigerator with no air leaks. Then refigure the needs of size. have some wells dug for thermo cooling of the freon. Solor cells for elec.
The cost monthly will be low but the cost of installation will take good 30 years to pay off.
There is so many ways of getting a a/c installed and every one has good ideas. all with increased cost to the buyer.
Proper duct design and return line with this small unit air from under the doors to a over head return to unit my mention of large enough not be able to notice the unit is running. I have been in houses where it is all you hear.
The cool air some times the fan is running so fast like sitting in car with windows is down
all designed by qualified a/c men.
Working under new houses and watching the duct work being installed by employees of large company makes me wonder if they cared about what they were doing. duct pushed and held by one screw and taped to keep in place just a bump and it is all loose and leaking.
Have told more than one owner to crawl under house and watch what is going on .
And again thinking of construction told one laying plywood decking on house roof maybe have his nailer put the nails in the truss. it would hold better.
Back to your problem of installing a/c units small heat pump self contained and your mother probally would be happy to have you around while doing the install.
Take your time were all getting older.
ken
Sigarms
Super Member
Sometimes you do get what you pay for, and sometimes when you pay a higher price, you get better work done. The key is to know what you're getting for your money. The problem with HVAC work IMO is that there are so many variables that can decide if the job is done "great" that it gets to confusing for the homeowner to know, and a $3,500 quote sure sounds a lot better than a $5,000 quote.
ANY time someone gets a quote for a new HVAC system for their home, a load calculation done by the estimator (and going over it with the homeowner) is the first sign that the job should be done right, as compared to calling the manufacturer to see what size system is already there so you know what size to quote LOL
orezok
Elite Member
We use the Mitsu units in our electrical and data rooms in the school district. We only use them in locations that where we are unable to get ducted units. We have no less than 50 and possibly 100 units in operation.
The facts are that these units are in rooms that have 24/7 heat generation and that the units run excessively. Given that usage, the Mitsu's are very problematic and have a high failure rate. We also have a problem with acquiring replacement parts. Mitsu distributors are very difficult to deal with. Even with the amount of our purchases ( 5 to 10 new units every year), they don't seem to care.
We would use regular split units, but there are very few small tonnage units available.
Not saying that this would apply in a residential use, but they are not designed for heavy use.
The facts are that these units are in rooms that have 24/7 heat generation and that the units run excessively. Given that usage, the Mitsu's are very problematic and have a high failure rate. We also have a problem with acquiring replacement parts. Mitsu distributors are very difficult to deal with. Even with the amount of our purchases ( 5 to 10 new units every year), they don't seem to care.
We would use regular split units, but there are very few small tonnage units available.
Not saying that this would apply in a residential use, but they are not designed for heavy use.
Arky217
Silver Member
Don't mean to hijack the thread, but I'm considering putting one of these mini-split ductless units in the house I'm building and until now have read good reports on the Mitsubishi units.
If one of these would be your primary heating/cooling, then what brands should be considered ?
Arky
WM75Guy
Elite Member
I would not recommend the split units. I have a Goodman split in my insulated tack room, 12'X12' with a 6'X6' bathroom. Runs a great deal of the time to keep it cool in the Texas heat. During the winter it will not heat below 40 degrees because of the heat pump design, I have to add electric heat to keep the pipes from freezing.
After 2 years it blew the circuit board in the outside unit, which burnt out the board in the inside unit. Six weeks to get boards. HVAC tech did not know much about the units I would stick with a conventional system that does not have electronic boards.
After 2 years it blew the circuit board in the outside unit, which burnt out the board in the inside unit. Six weeks to get boards. HVAC tech did not know much about the units I would stick with a conventional system that does not have electronic boards.
WM75Guy
Elite Member
In Texas you can do HVAC work on your homestead without a license. You cannot do the work on a rental unit. In the cities it requires a permit and inspection. Don't know about OK laws, I would check with the local authority having jurisdiction or the state. If you decide to sell or if a problem develops such as a fire, an illegal or improper installation could void a sale or an insurance claim. As an fire/arson investigator and building inspector for 22 years I have seen this happen numerous times.
I had one residence where the owner used low voltage landscape wire for all the electrical for his garage conversion and where he enclosed the back porch . He left the garage doors up so we would not see work being done. He died and his estate had to gut it before they could sell it.
I had one residence where the owner used low voltage landscape wire for all the electrical for his garage conversion and where he enclosed the back porch . He left the garage doors up so we would not see work being done. He died and his estate had to gut it before they could sell it.
